Champion Spark Plugs RV8C 121 Spark Plug @ 4- Made by Champion Spark Plugs Includes (4) Spark Plug Thread: 14mm, Reach: 11.2mm, Seat type: tapered, Hex size: 16mm, Tip configuration: non projected, Type: Standard, Terminal type: Solid, New, Bulk Packed Genuine Champion Spark Plugs Consult owners manual for proper part number identification and proper installation Please refer to list for compatibility